Glued Laminated Timber from Oil Palm Timber – Beam Structure, Production and Elastomechanical Properties

Heister, Lena; Fruehwald-Koenig, Katja

doi:10.1007/978-981-19-6195-3_3

Cited by 4 publications

(18 citation statements)

References 5 publications

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“…The rough-cut lamellas are calibrated using a two-side planer with HeliPlan tools from Leitz, Germany, one board of each pair to a thickness of 20 mm, the other to 17 mm. Details on the material preparation are given in Heister and Fruehwald-Koenig [11]. Some of the 17 mm lamellas are used for the tension test parallel to the vascular bundles (Table 1).…”

Section: Lamellas From Oil Palm Woodmentioning

confidence: 99%

“…compression strength (fc,0) parallel to the vascular bundles for MOR determined in preliminary investigations on small test specimens, published in Fruehwald-Koenig and Heister [4] and linearized by the natural logarithm. Details on the calculation of lamella strength class limits are described in Heister and Fruehwald-Koenig [11].…”

Section: Calculation Of Lamella Strength Class Limitsmentioning

confidence: 99%

“…Instead of the reduction factor ks (n), which depends on the number of specimens, the value of the 5 % quantile for a standard normal distribution (p0.05=1.645) is used in all calculations of the characteristic values in addition to the calculation according to the normalized reduction value for ks (n). Details on the bending test and the calculation of the results are described in Heister and Fruehwald-Koenig [11].…”

Section: Bending Testmentioning

confidence: 99%

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Elastomechanical Properties of Glued Laminated Timber Made of Strength Graded Oil Palm Lumber

Fruehwald-Koenig

2023

World Conference on Timber Engineering (WCTE 2023)

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The wood from oil palm trunks exhibits significant variations in distribution of structural tissue, density and elastomechanical properties across and along the trunk. Its reliable, safe, and economic usage for loadbearing purposes, such as glued laminated timber (GLT), requires a precise definition of its elastomechanical properties through appropriate strength grading procedures. Oil palm lumber is strength graded according to its density using an X-ray technique in which 50 % of the lamellas are ripped, graded, edge glued and therefore density homogenized, and 50 % are cut only according to their geometry. Lamellas are tested in tension parallel to the vascular bundles; combined GLT is produced from strength-graded lamellas and tested in bending parallel and compression parallel and perpendicular to the vascular bundles. The characteristic strength values for C10 and C14 according to EN 338 are achieved. A correlation between density and elastomechanical properties is established. GLT from density-homogenized lamellas achieve higher bending properties than from lamellas with a "natural" density gradient across the width.

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Section: Lamellas From Oil Palm Woodmentioning

confidence: 99%

Section: Calculation Of Lamella Strength Class Limitsmentioning

confidence: 99%

Section: Bending Testmentioning

confidence: 99%

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Elastomechanical Properties of Glued Laminated Timber Made of Strength Graded Oil Palm Lumber

Fruehwald-Koenig

2023

World Conference on Timber Engineering (WCTE 2023)

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“…Currently, no modelling of oil palm wood based products has been published. The aim of the work is to evaluate the suitability of FEM for determining the flexural properties of oil palm GLT by comparing the modelling results with the results of Heister and Fruehwald-Koenig [7] (static tests). Furthermore, possible relationships of the flexural properties with other material properties, primarily density, are evaluated.…”

Section: Introduction 234mentioning

confidence: 99%

“…Missing relationships are established by own investigations or approximation. The beams tested by Heister and Fruehwald-Koenig [7] are implemented in the modelling software RFEM 6.02. Using suitable statistical methods, the results of the different experiments are compared and evaluated.…”

Section: Introduction 234mentioning

confidence: 99%

Flexural Properties of Oil Palm Wood Based Glue Laminated Timber Using Finite Element Method

Hackel

2023

World Conference on Timber Engineering (WCTE 2023)

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The anatomical structure of oil palm wood is only to a limited extent comparable to common wood species used in construction. Typical for monocotyledons, the material is composed of high density vascular bundles and a parenchymatous tissue of lower density. In three experiment sets, the local and global moduli of elasticity (MOE) and the flexural strength of oil palm wood based GLT are determined using FEM and various influencing parameters are investigated in a sensitivity analysis. Furthermore, the application of densified tension lamellas is studied. The results of the modelling are compared with the results from mechanical tests. Significant differences, mainly attributed to the specific parameters of the selected material, are observed. The results of this preliminary study serve as a starting point for computer-aided optimisation and modelling of other oil palm-based products.

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Compression properties of glued laminated timber and tensile properties of gluelam lamellas from oil palm wood

Fruehwald-Koenig,

Heister

2024

Wood Material Science & Engineering

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Glued Laminated Timber from Oil Palm Timber – Beam Structure, Production and Elastomechanical Properties

Cited by 4 publications

References 5 publications

Elastomechanical Properties of Glued Laminated Timber Made of Strength Graded Oil Palm Lumber

Elastomechanical Properties of Glued Laminated Timber Made of Strength Graded Oil Palm Lumber

Flexural Properties of Oil Palm Wood Based Glue Laminated Timber Using Finite Element Method

Compression properties of glued laminated timber and tensile properties of gluelam lamellas from oil palm wood

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